#!/bin/sh
# func:自动监控tomcat脚本并且执行重启操作
# 定义环境变量
#PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/java/jdk1.5.0_11/bin
#export JAVA_HOME=/usr/java/jdk1.5.0_11
#export CLASSPATH=$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar
#export PATH=$PATH:$JAVA_HOME/bin
# DEFINE
# 获取tomcat进程ID
TomcatName=tomcat8080
TomcatID=$(ps -ef|grep $TomcatName|grep -v TomcatMonitor|grep -v grep |awk '{print $2}')
# tomcat启动程序(这里注意tomcat实际安装的路径)
StartTomcat=/tomcat8080/bin/startup.sh
TomcatCache=tomcat8080/work
# 定义要监控的页面地址 
WebUrl=http://175.25.19.56:8080/user/loginpage
# 日志输出
GetPageInfo=/tmp/TomcatMonitor_$TomcatName.Info
TomcatMonitorLog=/tmp/TomcatMonitor_$TomcatName.log
Monitor()
{
  echo "[info]开始监控$TomcatName...[$(date +'%F %H:%M:%S')]"
if [ $TomcatID ];then  #这里判断TOMCAT进程是否存在
    echo "[info]当前$TomcatName进程ID为:$TomcatID,继续检测页面..."
else
    echo "[error]$TomcatName进程不存在!$TomcatName开始自动重启..."
    echo "[info]$StartTomcat,请稍候......"
    rm -rf $TomcatCache
    $StartTomcat 
fi
# 检测是否启动成功(成功的话页面会返回状态"200")
TomcatServiceCode=$(curl -s -o $GetPageInfo -m 10 --connect-timeout 10 $WebUrl -w %{http_code})
if [ $TomcatServiceCode -eq 200 ];then
        echo "[info]页面返回码为$TomcatServiceCode,$TomcatName启动成功,测试页面正常......"
else
        echo "[error]$TomcatName页面出错,请注意......状态码为$TomcatServiceCode,错误日志已输出到$GetPageInfo"
        echo "[error]页面访问出错,开始重启$TomcatName"
        kill -9 $TomcatID  # 杀掉原tomcat进程
        sleep 3
        rm -rf $TomcatCache # 清理tomcat缓存
        $StartTomcat
fi
echo "------------------------------"
}
Monitor >> $TomcatMonitorLog
